Triple roller for watches



C. VERNER.

TRIPLE ROLLER FOR WATCHES.

APPLXCATRON FlLED JULY 26.1920.

TE-Ll llllllillllllllll UNITED STATES CLARENCE VERNER, OF CAIRO,ILLINOIS.

TRIPLE ROLLER FOR WATCHES.

Specification of Letters Patent. Patented N 16 1920 ApplicationfiledJuly 26, 1920. Serial No. 398,895.

To all whom it may concern.

Be it known that I, CLARENCE VERNER, a citizen of the United States,residin at Cairo, in the county of Alexander and tate of Illinois, haveinvented certain new and useful Improvements in Triple Rollers forWatches; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to an improvement in watch constructions, and oneobject of the invention is to provide an improved roller constructionwhich will be known as a triple roller and which will be used inconnection with the balance wheel forming part of the escapement.

Another object of the invention is to provide an improved constructionin this mechanism which will prevent the roller jewels from being brokenor working loose.

Another object of the invention is to so construct this balance wheelroller that the three rollers may be formed integral with the hub thusforming a unitary structure which will be very strong and durable andnot liable to easily break and which may further be easily replaced witha new one when necessary.

Another object of the invention is to provide'a construction of balancewheel roller which will be very efficient in operation and easy toconstruct.

This invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a fragmentary sectional view through the works of a watchshowing a balance wheel in side elevation and provided with the tripleroller construction,

Fig. 2 is a top plan view of the structure shown in Fig. 1,

Fig. 3 is a perspective view of the improved triple roller, and

Fig. 4 is a view similar to Fig. 3 showing a slightly modifiedconstruction.

The improved triple roller will all be formed in one piece and will bemounted upon the staff 1 of the balance wheel 2, thus forming a solidstructure making it unnecessary to provide adjustment of the parts whenthe triple roller device is put in place upon the staff. This staff isrotatably mounted. through the medium of the pins 3 so that the staffcan oscillate. The usual pallet fork 4 is provided and is provided withthe customary arms 5 so that the fork may be rocked upon its palletstaff 6. The triple roller is provided with a hub 7 having an opening 8formed therein to receive the balance staff 1 and this hub carries theupper and lower impulse rollers 9 and 10 and a safety roller 11 whichwill be positioned adjacent the lower end of the hub. The roller jewel12 is semi-circular in cross section as shown in Figs. 3 and 4 and hasits upper and lower ends fitting into pockets formed in the upper andlower impulse rollers 9 and 10 so that this roller jewel will besecurely held in place and firmly braced and thus prevented from beingbroken or easily worked loose from the impulse roller carrying it. Thesafety roller is provided with a cutout 13 and the pallet fork carries ablock 14 which block carries a safety guard or pin 15 which extends intothis cutout 13. it will thus be seen that as the balance wheel rotatesfirst in one direction and then in an opposite direction, the rollerewel by striking arms 5 of the pallet fork will oscillate this fork uponits staff, and as this fork oscillates, the safety guard will havemovement in the cutout 13 thus preventing the guard from interferingwith proper rotation of the balance wheel. If it is necessary to makerepairs, the balance wheel together with its standard or staff can beremoved and will carry with it, the triple roller. The roller can thenbe removed from the staff and a new staff put in place. The roller canthen be easily replaced upon the staff or an entire new roller put inplace and the balance wheel put back into the works of the watch.

If desired the upper and lower impulse rollers 9 and 10 may be cut fromopposite sides as shown in Fig. 1- thus lightening the rollers andfurther permitting the rollers to be evenly balanced.

I claim:

1. A roller construction comprising a hub having an opening formedtherein for re ceiving a balance wheel staff, upper and lower impulserollers carried by and rigid with the hub, a roller jewel carried by theimpulse rollers and having its end portions positioned in sockets formedin the impulse rollers, and a safety roller carried by the hub beneaththe lower impulse roller.

2. A roller construction comprising a hub having an upper impulse rollerat one end and a safety roller at the other end, and a second impulseroller carried by the hub between the safety roller and first impulseroller, the impulse rollers being provided with cutouts forming pocketsfor receiving a roller jewel.

3. A roller construction comprising a hub, an upper impulse rollercarried by the hub adjacent one end, a safety roller carried by the hubadjacent the opposite end thereof, a lower impulse roller carried by thehub between the upper impulse roller and safety roller, the impulserollers being provided with alined roller jewel receiving pockets, andthe safety roller being provided with a cutout positioned beneath thejewel receiving sockets of the impulse rollers.

4. A roller construction comprising a hub, impulse rollers rigid withthe hub and having jewel receiving pockets for receiving a jewelextending between the rollers, and a safety roller rigid with the hub.

5. A roller construction comprising a hub, impulse rollers carried bythe hub in spaced relation, a safety roller carried by the hub, therollers being formed integral with the hub and the impulse rollers beingcut from opposite sides to lighten and balance the rollers.

In testimony whereof I have hereunto set my hand.

CLARENCE VERNER.

